Introduction to jQuery

So you know html , css and javascript , Now lets know what is jQuery?. jQuery is a cross-platform , open source , client side javascript library. Its was Created by John Resig in 2005 an released in 2006 .

Why to Use jQuery?

It Simplifies the interaction between html and javascript.

It can be used to handle events purely in JavaScript. So, the HTML tags and JavaScript can be completely separated.

The JavaScript engines of different browsers differ slightly, so JavaScript code that works for one browser may not work on the other. It handles all these cross-browser inconsistencies and provides a consistent interface that works across different browsers.

Offers DOM manipulation based on CSS selectors.

Has Tons of Plugins.

Usage Examples

First you need to include the jQuery file which is a single javascript file , you can use the CDN hosted file or download the file and include

<script src="jquery.js"></script>

<script src="code.jquery.com/jquery-1.11.1.min.js"></script>

‘$’ is a jQuery alias which is used . If there are other libraries you can use ‘.noConflict()’ mode which relinquishes control of $.The syntax goes like this $(selector).action().